patch to get SDL to build under Mac OS X Mavericks

[Jan Danielsson <jan.m.danielsson%gmail.com@localhost>]

Hello,

   Attached patch makes SDL build on my Macs.

   /Jan

$NetBSD$

--- src/video/quartz/SDL_QuartzVideo.h.orig     2014-04-14 07:38:30.000000000 
+0000
+++ src/video/quartz/SDL_QuartzVideo.h
@@ -91,7 +91,9 @@ typedef struct SDL_PrivateVideoData {
     CGDirectDisplayID  display;            /* 0 == main display (only support 
single display) */
     const void         *mode;              /* current mode of the display */
     const void         *save_mode;         /* original mode of the display */
+#if (MAC_OS_X_VERSION_MIN_REQUIRED < 1070)
     CGDirectPaletteRef palette;            /* palette of an 8-bit display */
+#endif
     NSOpenGLContext    *gl_context;        /* OpenGL rendering context */
     NSGraphicsContext  *nsgfx_context;     /* Cocoa graphics context */
     Uint32             width, height, bpp; /* frequently used data about the 
display */